Types Of Glaciers Flashcards

0
Q

How big is a ice sheet

A

50000 km3<

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1
Q

8 types of glaciers

A
Ice sheets 
I've caps 
Ice field
Valley glacier 
Corrie glacier 
Piedmont glacier
Niche glaciers 
Ice shelves
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2
Q

Example of ice sheets?

A

Antartica and Greenland

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3
Q

What shape is a ice cap?

A

Huge dome-shape

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4
Q

Where do ice caps develop?

A

High plateaus

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5
Q

What size are ice caps

A

<50000km3

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6
Q

What is a ice field?

A

Where much of an upland region is covered by glacial ice, just the taller peaks exposed (nunataks)

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7
Q

What is a valley glacier?

A

Larger masses of ice that flow from ice ice fields or corgis and usually follow preglacial river valleys

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8
Q

What do valley glaciers form

A

Developing steep sides as they erode their course

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9
Q

What are cirque glaciers?

A

Small ice masses on mountain slopes which gradually erode armchair shaped hollows.

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10
Q

What happens if a cirque glacier gets to large?

A

They spill over the lip to feed a valley glacier

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11
Q

What direction do cirque glaciers face?

A

N NE

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12
Q

What size ares do Corrie glacier face?

A

0.5 to 10 km2

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13
Q

What is a piedmont glacier

A

Large lobes of ice formed when glaciers spread out on reaching lowland areas and escaping the confines of the valley

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14
Q

How thick is the Antarctic ice sheet

A

Attains thickness of 4000m

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15
Q

What a ice shelve?

A

Extensions of ice sheets reaching out over the sea.

16
Q

How thick can an ice sheet be?

A

1000m

17
Q

Example of temperate glacier?

A

Atchabasca Canada

18
Q

Example of polar glacier?

A

Merserve glacier Antarctica

19
Q

Where are cold glaciers found? Example

A

Arctic and Antarctica

20
Q

Where are temperate glaciers found? Examples?

A

Alps and Rockies

21
Q

Where are cold glaciers found?

A

High latitude

Low relief

22
Q

What are temp in cold glacier?

A

Throughout below 0

23
Q

What are basal temps in cold glacier?

A

Below pmp, frozen to bed

24
Q

What happens in a cold glacier due to ice being frozen to bedrock?

A

Little ice movement
Little erosion
Little friction

25
Q

How much does a cold glacier move per day?

A

1-2cm

26
Q

What are the mechanism for movement in a cold glacier?

A

Internal deformation

27
Q

What is there limited in a cold glacier?

A

Ablation and accumulation

28
Q

Where are temperate glaciers found

A

High altitude

29
Q

What features are common in temperate glaciers

A

Fluvial glacial features

30
Q

What is the relief like in a temperate glacier

A

Steep

31
Q

What is the base temp in temperate glacier?

A

0 at or below pmp

32
Q

How much does temperate glacier Move per day?

A

2-3 m

33
Q

How much does a temperate glacier move per year?

A

20-200m

34
Q

Which type of glacier a more powerful erosive agent

A

Temperate

35
Q

How much does a cold glacier move per year?

A

3-4 m (Merserve glacier Antarctica)

36
Q

Movement in temperate glacier?

A

Basal slippage